Hide experimental app list Google logo and custom launcher page when search engine is not Google.

chrome/browser/ui/app_list/app_list_view_delegate.h

Index: chrome/browser/ui/app_list/app_list_view_delegate.h
diff --git a/chrome/browser/ui/app_list/app_list_view_delegate.h b/chrome/browser/ui/app_list/app_list_view_delegate.h
index ecd7ed2ae374ff16f62f2a79c99b3c5cb9068cca..d351d854ac146648ada91c957395751b777844f9 100644
--- a/chrome/browser/ui/app_list/app_list_view_delegate.h
+++ b/chrome/browser/ui/app_list/app_list_view_delegate.h
@@ -19,6 +19,8 @@
 #include "chrome/browser/search/hotword_client.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/browser/ui/app_list/start_page_observer.h"
+#include "components/search_engines/template_url_service.h"
+#include "components/search_engines/template_url_service_observer.h"
 #include "components/signin/core/browser/signin_manager_base.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ -60,7 +62,8 @@ class AppListViewDelegate : public app_list::AppListViewDelegate,
                             public ProfileInfoCacheObserver,
                             public SigninManagerBase::Observer,
                             public SigninManagerFactory::Observer,
-                            public content::NotificationObserver {
+                            public content::NotificationObserver,
+                            public TemplateURLServiceObserver {
  public:
   // Constructs Chrome's AppListViewDelegate with a NULL Profile.
   // Does not take ownership of |controller|. TODO(tapted): It should.
@@ -116,6 +119,9 @@ class AppListViewDelegate : public app_list::AppListViewDelegate,
   void AddObserver(app_list::AppListViewDelegateObserver* observer) override;
   void RemoveObserver(app_list::AppListViewDelegateObserver* observer) override;
 
+  // Overridden from TemplateURLServiceObserver:
+  void OnTemplateURLServiceChanged() override;
+
  private:
   // Updates the speech webview and start page for the current |profile_|.
   void SetUpSearchUI();
@@ -192,6 +198,9 @@ class AppListViewDelegate : public app_list::AppListViewDelegate,
 
   ObserverList<app_list::AppListViewDelegateObserver> observers_;
 
+  ScopedObserver<TemplateURLService, AppListViewDelegate>
+      template_url_service_observer_;
+
   // Used to track the SigninManagers that this instance is observing so that
   // this instance can be removed as an observer on its destruction.
   ScopedObserver<SigninManagerBase, AppListViewDelegate> scoped_observer_;